kdb+ and q
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In-place attribute removal

Is there any way to do this? `# looks to always be creating a copy of the original list for `g/`u, whether it's applied on a list reference or value. I wrote a C function to set the list object's u member (x->u) to 0, and from within q called this fu...

Large Scale WindowJoins Questions

Hello Fellow Qbies, I'm attempting to run a wj across a table with a dimension of 1million rows and 30 columns. It works, but it takes too long to run. What are some tips and tricks to dealing with large datasets and windowjoins?

planefan by Contributor
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  • 1 kudos

Resolved! Count items from a dynamic list

Hi, Masters: Say I have a list contains dynamic sym variables: `a`b`a`b`c`d`c`b`a... How can I count each sym and get an output such as: `a:4 `b:3 `c:2 `d:1